Structural alloyed steel for carburization 16NiCrMo12, 16NCD13, 14ChN3M for heavy duty machine parts, structures and devices according to UNI 7846, UNI 8788.
| Standards | Steel Grade | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical composition % | ||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | Cu: | Al: | |
| UNI | 16NiCrMo12 - 16 NiCrMo 12 | |||||||||
| 0.13 - 0.18 | 0.4 - 0.7 | 0.15 - 0.40 | <0.035 | <0.035 | 0.80 - 1.10 | 2.7 - 3.2 | 0.3 - 0.4 | - | - | |
| GOST | 14ChN3M - 14KhN3M - 14HN3M - 14ХН3М | |||||||||
| 0.11 - 0.17 | 0.3 - 0.6 | <0.40 | <0.025 | <0.035 | 0.80 - 1.10 | 3.0 - 3.5 | 0.2 - 0.3 | - | - | |
| AFNOR | 16NiCrMo13 - 16 NiCrMo 13 | |||||||||
| 0.12 - 0.17 | 0.3 - 0.6 | 0.15 - 0.35 | <0.025 | <0.015 | 0.90 - 1.15 | 3.0 - 3.5 | 0.15 - 0.30 | <0.35 | <0.05 | |
| AFNOR | 16NCD13 - 16 NCD 13 | |||||||||
| 0.17 | 0.45 | - | - | - | 1.0 | 3.25 | 0.25 | - | - | |
| UNI | 15NiCrMo13 - 15 NiCrMo 13 | |||||||||
| 0.12 - 0.17 | 0.3 - 0.6 | 0.15 - 0.40 | <0.030 | <0.025 | 0.8 - 1.1 | 3.0 - 3.5 | 0.2 - 0.3 | - | - | |
| BS | 832M13 - 832 M 13 - 832H13 - 832M13 | |||||||||
| 0.10 - 0.16 | 0.35 - 0.60 | 0.10 - 0.35 | <0.035 | <0.040 | 0.7 - 1.0 | 3.00 - 3.75 | 0.10 - 0.25 | - | - | |
| BS | S157 - S.157 | |||||||||
| 0.17 | 0.45 | - | - | - | 1.0 | 3.25 | 0.25 | - | - | |
| ASTM | AISI 9310H - AISI 9310 H | |||||||||
| 0.07 - 0.13 | 0.4 - 0.7 | 0.15 - 0.35 | <0.040 | <0.035 | 1.00 - 1.45 | 2.95 - 3.55 | 0.08 - 0.15 | - | - | |
16NiCrMo12 - application and description
Structural steel 16NiCrMo12 is an alloy grade for thermo-chemical treatment - carburizing. It is mainly used in the aviation industry for particularly heavy duty parts and components. The 16NiCrMo12 steel is a grades mostly used to make special screws, sleeves, drive shafts, cogwheels, and connecting rods.
Mechanical properties of 16NiCrMo12 for 10-60mm range dimensions:
- Tensile strength, Rm: 980 - 1520 MPa
- Yield point, Re: 735 - 980 MPa
- Elongation, A: 9 - 10%
- Notch toughness, KCU: 32,5 - 42,5 J
- Hardness in annealed condition < 250 HB
- Hardness after isothermal annealing, 190 - 237 HB
- Hardness after spheroidizing annealing < 225 HB
Heat treatment processes:
- Normalising annealing at 830 - 860 °C
- Annealing with isothermal transformation at 800 - 840 ℃, with cooling at 620 ℃ for 5 hours
- Quenching at 820 - 840℃ or 790 - 810℃
- Tempering at 160 - 200℃
In the above mentioned grades Rolex Metal supplies companies with:
- Hot-rolled, peeled and drawn bars S157, 16NiCrMo12, 16NCD13
- Forging and forged bars S157, 16NiCrMo12, 16NCD13
The other alternatives and substitutes:
16NCD13, 16 NCD 13, 14HN3M, 14ChN3M, 14KhN3M, 16NCD12, 16 NCD 12, 20HN3MA, 20ChN3MA, 20KhN3MA, 14ХН3М, 14ХН3МА, 20ХН3МА, 19NiCrMo11-5F, 22NiCrMo12-5F, 23NiCrMo12-5F, 25NiCrMo12-5F, BNCMo 2, BNCMo2, 15Ni13Cr3Mo2, 15NiCrMo13, 15 NiCrMo 13, AISI 9310H, AISI 9310, G93100, G93106, H93100, H93104, H93106, AISI 9314.